This screenshot of Twitter post from the page of Keith Mark shows photos of Interior Secretary Ryan Zinke meeting with Donald Trump Jr. and Keith Mark. A new U.S. advisory board created to help rewrite federal rules for importing the heads and hides

In this frame grab from a Monday, Jan. 8, 2018, video on the Twitter feed of the Douglas County, Colo., Sheriffs Department, Sheriff Tony Spurlock speaks to subscribers to explain the incident in which a deputy was gunned down responding to a call on

In this frame grab from a Monday, Jan. 8, 2018, video on the Twitter feed of the Douglas County, Colo., Sheriffs Department, Sheriff Tony Spurlock speaks to subscribers to explain the incident in which a deputy was gunned down responding to a call on

FILE - This Oct. 26, 2016 file photo shows a Twitter sign outside of the company's headquarters in San Francisco. A new study published Thursday, March 8, 2018, in the journal Science shows that false information on the social media network travels s